Screen.



110.893,?29. PATENTED JULY21,1908.

- H. K. HANSEN.

SCREEN.

' APPLICATION nun APR. 3. 1907.

wi tmao oeo I I I UNITED STATES PATENT OFFICE.

HEBER K. HANSEN, OF LOGAN, UTAH, ASSIGNOR OF ONE-FOURTH TO FRED TURNERAND ONE-FOURTH TO N. RALPH MOORE, OF LOGAN, UTAH.

SCREEN.

Specification of Letters Patent.

Patented July 21, 1908.

Original application filed April 23, 1906, Serial No. 313,222. Dividedand. this application filed April 3, 1907. Serial To all whom it mayconcern:

Be it known that I, HEBER K. HANsEN, a citizen of the United States,residing at Logan, in the county of Cache and State of Utah, haveinvented a new and useful Screen, of which the following is aspecification.

The present case is a division from copending application, Serial No.313,222, and the invention covered by the claims of this applicationrelates to screens, particularly useful in connection with the grainseparating machine set forth in said co-pending application, butundoubtedly capable of being used in other connections.

The principal object of the present invention is to provide a novel andsimple screen that will effectively operate on different classes of seedor grain passed thereover, and effect their proper separation,permitting one type to pass through the screen, and prohibiting thepassage of grain of other characters.

In the accompanying drawings :Figure 1 is a plan view of a portion ofthe preferred embodiment of the separating screen. Fig. 2 is a sectionalview on the line 22 of Fig. 1. Fig. 3 is a cross sectional view on theline 33 of Fig. 1.

Similar reference numerals designate corresponding parts in all thefigures of the drawings.

The screen, designated as a whole by the reference numeral 35, consistsof a sheet or plate of metal that is transversely corrugated, or inother words, provided. with transverse ribs, which have sets ofelliptical openings 36 therein, said openings being formed in the uppersides of the transverse ribs and disposed in staggered relation. Thesaid transverse ribs or corrugations are formed by curving the materialat the lower end of each opening upwardly, as shown at 37 and curvingthe material at the other end downwardly, as shown at 38, the downwardcurvature of each opening extending be tween the upstanding ends of theopenings in advance thereof. This, it is thought, will be clear byreference to Fig. 1. Furthermore because of the arrangement, angularlydisposed webs 39 are produced at each end of each opening, saidwebsbeing joined to longitudinal webs 40 on opposite sides of the openings.

As a result, it Will be noted that the openings are set on aninclination, and if the plate is disposed in an opposite inclination,said openings will be disposed at an inclination in opposition to thepath of travel of the grain, and the downwardly inclined or curvedportion thereof disposed in front of each opening, serves as a guidethat turns long rolling kernels endwise, and adjusts them to passthrough the openings, if small enough. Of course said openings may bemade of different sizes for different characters of grain. The screenhas been found particularly useful, however in separating oats and ryefrom wheat.

From the foregoing, it is thought that the construction, operation, andmany advantages of the herein. described invention will be apparent tothose skilled in the art, without further description, and it will beunder stood that various changes in the size, shape, proportion, andminor details of construction, may be resorted to without departing fromthe spirit or sacrificing any of the advantages of the invention.

Having thus fully described my invention, what I claim as new, anddesire to secure by Letters Patent, is 2- A screen comprising a sheethaving elongated openings therethrough, said openings being disposed intransverse rows, and each opening being located lengthwise of the sheet,the openings in adjacent rows being disposed in staggered relation, withthe front ends of those in one row located in close association with thematerial between the openings of the adjacent row and wider than thedistance between the said openings, the portions of material in rear ofeach opening being upwardly converted and the portions of material inadvance of each opening being downwardly concaved, the convexity of oneportion leading into the concavity of the adjacent portion transverselyof the plate, said configuration producing transversely disposedupstanding ribs on the sheet with the openings located at an inclinationin the upper sides of said ribs.

In testimony, that I claim the foregoing as my own, I have heretoaffixed my signature in the presence of two witnesses.

HEBER K. HANSEN. Witnesses:

J. O. WALTERS, J. Z. STEWART, Jr.

